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Ubuntu Security Notice USN-4114-1

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Ubuntu Security Notice USN-4114-1
September 02, 2019

linux, linux-azure, linux-gcp, linux-gke-5.0, linux-hwe, linux-kvm,
linux-raspi2, linux-snapdragon vulnerabilities
A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 19.04
- Ubuntu 18.04 LTS


Several security issues were fixed in the Linux kernel.

Software Description:
- linux: Linux kernel
- linux-azure: Linux kernel for Microsoft Azure Cloud systems
- linux-gcp: Linux kernel for Google Cloud Platform (GCP) systems
- linux-kvm: Linux kernel for cloud environments
- linux-raspi2: Linux kernel for Raspberry Pi 2
- linux-snapdragon: Linux kernel for Snapdragon processors
- linux-gke-5.0: Linux kernel for Google Container Engine (GKE) systems
- linux-hwe: Linux hardware enablement (HWE) kernel


Amit Klein and Benny Pinkas discovered that the Linux kernel did not
sufficiently randomize IP ID values generated for connectionless networking
protocols. A remote attacker could use this to track particular Linux
devices. (CVE-2019-10638)

Praveen Pandey discovered that the Linux kernel did not properly validate
sent signals in some situations on PowerPC systems with transactional
memory disabled. A local attacker could use this to cause a denial of
service. (CVE-2019-13648)

It was discovered that the floppy driver in the Linux kernel did not
properly validate meta data, leading to a buffer overread. A local attacker
could use this to cause a denial of service (system crash).

It was discovered that the floppy driver in the Linux kernel did not
properly validate ioctl() calls, leading to a division-by-zero. A local
attacker could use this to cause a denial of service (system crash).

Jason Wang discovered that an infinite loop vulnerability existed in the
virtio net driver in the Linux kernel. A local attacker in a guest VM could
possibly use this to cause a denial of service in the host system.

Update instructions:

The problem can be corrected by updating your system to the following
package versions:

Ubuntu 19.04:
linux-image-5.0.0-1015-gcp 5.0.0-1015.15
linux-image-5.0.0-1015-kvm 5.0.0-1015.16
linux-image-5.0.0-1015-raspi2 5.0.0-1015.15
linux-image-5.0.0-1018-azure 5.0.0-1018.19
linux-image-5.0.0-1019-snapdragon 5.0.0-1019.20
linux-image-5.0.0-27-generic 5.0.0-27.28
linux-image-5.0.0-27-generic-lpae 5.0.0-27.28
linux-image-5.0.0-27-lowlatency 5.0.0-27.28

Ubuntu 18.04 LTS:
linux-image-5.0.0-1015-gke 5.0.0-1015.15~18.04.1
linux-image-5.0.0-1018-azure 5.0.0-1018.19~18.04.1
linux-image-5.0.0-27-generic 5.0.0-27.28~18.04.1
linux-image-5.0.0-27-generic-lpae 5.0.0-27.28~18.04.1
linux-image-5.0.0-27-lowlatency 5.0.0-27.28~18.04.1

After a standard system update you need to reboot your computer to make
all the necessary changes.

ATTENTION: Due to an unavoidable ABI change the kernel updates have
been given a new version number, which requires you to recompile and
reinstall all third party kernel modules you might have installed.
Unless you manually uninstalled the standard kernel metapackages
(e.g. linux-generic, linux-generic-lts-RELEASE, linux-virtual,
linux-powerpc), a standard system upgrade will automatically perform
this as well.

CVE-2019-10638, CVE-2019-13648, CVE-2019-14283, CVE-2019-14284,

Package Information:

khalil shreateh

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